Well Sat. night George Hernandez, myself, and one of my buddies w/ an Indy Ram
were comparing our driving skills and as I hit the mid-top of 3rd. gear it
started pinging like crazy. This is w/ the 180 thermo., one range colder plugs,
and home made cold air (these are the only things I could see changing the
pinging problem anyway). Sometime I would like to find out why it does
this(Bernd and myself didn't exactly go through a street-race, I mean dragstrip,
style session w/ the tests). This was on 89 octane. Other things I have done are
a home ported throttle-body, synthetic oil,exhaust(no headers), and yes it does
have good wires (they shouldn't be arcing to one another). I don't have a
problem running 93 octane it's just he point that I don't think it should ping
on 89 once in a while.
While I 'm here, the 2000 R/T's DEFINETLY run better than the previous years. I
have beaten three fairly stock R/T's (98-99), and George's truck was running way
better than any of those. All he has is a cone filter and he was inching up on
me(had to back off in third because of that lovely ping sound). How about next
Sat. (w/ some 93 in the tank) George?
Erich
"Bernd D. Ratsch" wrote:
> We used Erich Hanhart's '98 5.2L/5spd for this test (Stock except for 180
> degree T'Stat):
>
> After about 10 minutes on the Kal/OBD-II scanner, here's the results of his
> pinging problem...
>
> At idle: Timing is at 3.5 - 5 degrees BTDC
> At part throttle (under 2000rpm): Timing is at 26-30 degrees BTDC
> At part throttle (above 2200rpm): Timing is at 38-40 degrees BTDC
> At WOT: Timing is at 26 - 28 degrees BTDC
>
> What we found was that from a part throttle to WOT "stab", the truck pinged
> and only the timing had a delay of about 1 second to change settings (all
> other sensors reacted a lot faster), causing the truck to run at WOT and at
> 40 degrees BTDC. This definitely will cause pinging. If the delay would be
> shorter, the timing would have a better chance of adjusting to the WOT
> acceleration.
>
> What i'm concerned with is the 40 degrees coming in before 3000rpm. Under a
> light load (22% shown on Erich's truck), this would cause pinging without
> the use of higher octane fuel.
>
> I wonder if this is what the problem is with the rest of the Dak's. (I had
> checked mine and the timing is under 40 degrees BTDC until after
> 3100rpm...my truck doesn't ping at light throttle and never has.)
>
> Ideas anyone??
>
> Bernd D. Ratsch
> Pflugerville, TX
> 1997 Dodge Dakota SLT/CC - 2WD
> http://lonestar.texas.net/~bernd/Dakota.htm
> http://www.mopars.net/dak/bernd/
> bernd@texas.net
> ICQ: 39320084
>
> "Have I gone too far...Or has Toyota not gone far enough!"
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